Tribological Properties of DLC Coating for Parts of Weapons

2020 ◽  
Vol 99 (1) ◽  
pp. 297-307
Author(s):  
Zbynek Studeny ◽  
Zdenek Pokorny ◽  
David Dobrocky ◽  
Zdenek Joska ◽  
Jiri Prochazka
Keyword(s):  
Tribological Properties ◽  
Dlc Coating

TRIBOLOGICAL PROPERTIES OF THE CARBON AND NITROGEN-BASED HARD FILMS SLIDING AGAINST THE NICKEL-BASED SUPERALLOY

2020 ◽  
Vol 27 (08) ◽  
pp. 1950197
Author(s):  
X. L. LEI ◽  
B. X. YANG ◽  
Y. HE ◽  
F. H. SUN
Keyword(s):  
Tribological Properties ◽  
Cutting Tools ◽  
High Hardness ◽  
Wear Rates ◽  
Nickel Based Superalloy ◽  
Dlc Coating ◽  
Nano Crystalline ◽  
Debris Particles ◽  
Mild Wear ◽  
Super Alloy

This study is focused on the tribological properties of micro- and nano-crystalline diamond (MCD and NCD), non-hydrogenated and hydrogenated diamond-like carbon (DLC and DLC-H) and nitrogen-based (CrN, TiN and TiAlN) coatings sliding against the super alloy Inconel 718, in terms of the maximal and average coefficients of frictions (COFs), the worn morphologies and the specific wear rates, by the rotating ball-on-plate configuration under dry condition. The results show that the nitrogen-based films show comparable COFs and wear rates with the WC–Co substrates. The DLC and DLC-H show lower COFs compared with the nitrogen-based films. Furthermore, their wear resistance is limited due to their low thickness compared with MCD and NCD, which have the same elemental composition. The DLC-H coating exhibits much lower wear rate compared with the DLC coating, which may be derived from the passivation of dangling bonds by the linking of H to C atoms. The MCD and NCD films show the lowest average COFs and mild wear after tribotests, due to their high hardness and low adhesive strength between pure diamond and the super alloy. Among all the tested films, the NCD film-based tribopair presents the lowest maximal and average COFs, tiny wear debris particles, mild wear of ball and plate without scratching grooves, indicating that the NCD film may be suitable to be deposited on cutting tools for super alloy machining.

Combination of laser surface texturing and DLC coating on PEEK for enhanced tribological properties

2017 ◽  
Vol 329 ◽  
pp. 29-41 ◽  
Author(s):  
Johnny Dufils ◽  
Frédéric Faverjon ◽  
Christophe Héau ◽  
Christophe Donnet ◽  
Stéphane Benayoun ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Surface Texturing ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Dlc Coating

scholarly journals Investigation of changes in the properties of diamond-like films under friction by the XPS method

2021 ◽  
Vol 2131 (5) ◽  
pp. 052038
Author(s):  
A V Sidashov ◽  
M V Boiko ◽  
E I Luneva ◽  
A M Popov
Keyword(s):  
Tribological Properties ◽  
Photoelectron Spectroscopy ◽  
Etching Time ◽  
Energy Position ◽  
Dlc Coatings ◽  
Mechanical And Tribological Properties ◽  
Dlc Coating ◽  
Electron Line ◽  
Antifriction Properties

Abstract The combination of unique physicochemical, mechanical and tribological properties of diamond-like coatings determines the prospects for their use in critical friction units, including those operating in a rarefied atmosphere and vacuum. The properties of diamond-like carbon (DLC) coatings depend on the contribution of the sp2 and sp3 fractions of the carbon hybrid atomic electron orbitals. Modern methods of determining the graphite and diamond proportion in coatings are time-consuming and insufficiently accurate. In addition, the determination of the sp3/sp2 ratio is often difficult due to the displacement of the energy position of the C1s electron line. In this paper, the change in the chemical state of carbon over the thickness of a diamond-like coating is studied by X-ray photoelectron spectroscopy. Analysis of the carbon line fine structure of the differential graphite spectra (sp2 bonds) and diamond (sp3 bonds) allowed us to establish the parameter δ, which determines the ratio of the graphite and diamond components in the DLC coating. Profiling with Ar+ ions of the diamondlike coating surface showed that with an increase in the etching time, the proportion of amorphized carbon increases, which means that the antifriction properties increase with the abrasion of the coating. The obtained regularities allow us to predict changes in the tribological properties of DLC coatings during operation. Ion profiling also allows to determine the thickness of coatings with high accuracy.

202 Improvement of Tribological Properties by DLC Coating and FPB Process for Engineering Plastics

2000 ◽  
Vol 2000 (0) ◽  
pp. 37-38
Author(s):  
Hideto SUZUKI ◽  
Yutaka WATANABE ◽  
Atsuo KAWANA ◽  
Kazunari IKEDA
Keyword(s):  
Tribological Properties ◽  
Dlc Coating ◽  
Engineering Plastics

scholarly journals Tribological Properties of Hybrid Process DLC Coating against Magnesium Alloy

2006 ◽  
Vol 47 (4) ◽  
pp. 1008-1012 ◽  
Author(s):  
Tai Kumagai ◽  
Kisaburo Shimamura ◽  
Haruo Okahara ◽  
Yorinobu Takigawa ◽  
Kenji Higashi
Keyword(s):  
Magnesium Alloy ◽  
Tribological Properties ◽  
Hybrid Process ◽  
Dlc Coating

Tribological Properties of DLC Coating with Various Zr Target Current

2017 ◽  
Vol 739 ◽  
pp. 23-29
Author(s):  
Wen Hsien Kao
Keyword(s):  
Mechanical Properties ◽  
Tribological Properties ◽  
Photoelectron Spectroscopy ◽  
Wear Depth ◽  
X Ray Diffraction ◽  
Properties Of Coatings ◽  
X Ray ◽  
Dlc Coating ◽  
Unbalanced Magnetron ◽  
G Ratio

The main purpose of this study is to research the tribological properties and mechanical properties of diamond-like carbon coating (DLC) used unbalanced magnetron sputtering system (UBMS). The objective is influence of various Zr target current on the properties of coatings, current from 0.0 A to 0.5 A. The cross-section morphology was observed by field emission scanning electron microscopy (FE-SEM). With the increase of the Zirconium targets current, the quantity contained of the Zirconium increases. Raman spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were employed to analyze the microstructure properties of the coatings. The nanoindentation tester was used to measure the mechanical properties. Furthermore, the wear tests were achieved through the Schwingung Reibung and Verschliess (SRV) reciprocating wear tester under dry condition. The DLC coating was deposited used 0.4 A Zr target current possessed the lowest I(D)/I(G) ratio, the highest sp3 content and highest hardness. The DLC coating (0.4A) also displayed excellent tibological properties including the lowest friction coefficient, and wear depth.

scholarly journals Evaluating the Mechanical and Tribological Properties of DLC Nanocoated Aluminium 5051 Using RF Sputtering

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
L. Natrayan ◽  
Anjibabu Merneedi ◽  
Dhinakaran Veeman ◽  
S. Kaliappan ◽  
P. Satyanarayana Raju ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Rf Sputtering ◽  
Wear Behaviour ◽  
Deposition Mechanism ◽  
Dlc Coatings ◽  
Sputtering Deposition ◽  
Mechanical And Tribological Properties ◽  
Automotive Engines ◽  
Dlc Coating ◽  
Insight Into

The diamond-like carbon- (DLC-) coating technique is used in the sliding parts of automotive engines, among other applications, to reduce friction and wear. In this work, DLC has been coated on the Aluminium 5051 sample to assess the mechanical and tribological properties. A sputtering deposition mechanism is used, and the DLC is coated using a graphite target. The developed DLC coatings are tested for adhesion strength, hardness, chemical composition using XRD, and wear behaviour. The developed DLC thin films have considerably increased the wear behaviour of the Aluminium 5051 sample and have fulfilled the objective of this study. The XRD data indicated the presence of amorphous carbon in the coating with a threefold increase to the hardness of the naked aluminium. This study provides insight into improving the aluminium wear resistance by developing a considerably hard coating.

scholarly journals Investigation of tribological properties of CarbonX coating deposited on 100Cr6 steel

2019 ◽  
Vol 25 (25) ◽  
pp. 52-55
Author(s):  
Martin Vicen ◽  
Jozef Bronček ◽  
František Nový
Keyword(s):  
Mechanical Properties ◽  
Friction Coefficient ◽  
Tribological Properties ◽  
Bearing Steel ◽  
Friction Process ◽  
Dlc Coating

Abstract The article deals with a reduction of friction coefficient of bearing steel 100Cr6. Reduction of friction was achieved by means of a CarbonX DLC coating. The coating exhibited excellent friction and mechanical properties. This coating was applied to samples made of 100Cr6 bearing steel. The friction results of the CarbonX coating were compared to the friction results of the 100Cr6 bearing steel. Reducing the friction of 100Cr6 bearing steel resulted in reduced wear and increase lifetime. The friction process of the samples will take place in an environment without lubrication. The aim of the article is to verify the behaviour of the DLC coating without the presence of lubricant in the friction node. The achieved results are to be interpreted in the conclusion of article.

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